如何使用Python在一个函数中重复TCP/IP通信？

我用Python编写了以下TCP/IP代码

client.py

import socket
from contextlib import closing

def send_msg():
    host = '127.0.0.1'
    port = 4000
    buf_size = 4096

    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    with closing(sock):
        sock.connect((host, port))
        sock.send(b'hello world')
    return

send_msg()

import socket
from contextlib import closing

def run_server():
    host = '127.0.0.1'
    port = 4000
    backlog = 10
    buf_size = 4096
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    with closing(sock):
        sock.bind((host, port))
        sock.listen(backlog)
        while True:
            conn, address = sock.accept()
            with closing(conn):
                msg = conn.recv(buf_size)
                print(msg)
    return

run_server()

import socket
from contextlib import closing

def send_msg():
    host = '127.0.0.1'
    port = 4000
    buf_size = 4096

    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    with closing(sock):
        sock.connect((host, port))
        while True:
            sock.send(b'hello world')
    return

send_msg()

server.py

import socket
from contextlib import closing

def send_msg():
    host = '127.0.0.1'
    port = 4000
    buf_size = 4096

    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    with closing(sock):
        sock.connect((host, port))
        sock.send(b'hello world')
    return

send_msg()

import socket
from contextlib import closing

def run_server():
    host = '127.0.0.1'
    port = 4000
    backlog = 10
    buf_size = 4096
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    with closing(sock):
        sock.bind((host, port))
        sock.listen(backlog)
        while True:
            conn, address = sock.accept()
            with closing(conn):
                msg = conn.recv(buf_size)
                print(msg)
    return

run_server()

import socket
from contextlib import closing

def send_msg():
    host = '127.0.0.1'
    port = 4000
    buf_size = 4096

    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    with closing(sock):
        sock.connect((host, port))
        while True:
            sock.send(b'hello world')
    return

send_msg()

这些代码运行良好

但我不想重复执行send_msg（）

实际上，我想在send_msg（）函数中编写一个while语句并重复传输，如下面的代码所示

clientError.py

import socket
from contextlib import closing

def send_msg():
    host = '127.0.0.1'
    port = 4000
    buf_size = 4096

    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    with closing(sock):
        sock.connect((host, port))
        sock.send(b'hello world')
    return

send_msg()

import socket
from contextlib import closing

def run_server():
    host = '127.0.0.1'
    port = 4000
    backlog = 10
    buf_size = 4096
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    with closing(sock):
        sock.bind((host, port))
        sock.listen(backlog)
        while True:
            conn, address = sock.accept()
            with closing(conn):
                msg = conn.recv(buf_size)
                print(msg)
    return

run_server()

import socket
from contextlib import closing

def send_msg():
    host = '127.0.0.1'
    port = 4000
    buf_size = 4096

    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    with closing(sock):
        sock.connect((host, port))
        while True:
            sock.send(b'hello world')
    return

send_msg()

但是，clientError.py给出了一个错误

错误的详细信息如下

"clientError.py", line 13, in send_msg
    sock.send(b'hello world')
ConnectionResetError: [WinError 10054] An existing connection was forcibly closed by the remote host

---

如何在一个函数中重复发送？

我可以通过如下修改server.py来重复发送

"clientError.py", line 13, in send_msg
    sock.send(b'hello world')
ConnectionResetError: [WinError 10054] An existing connection was forcibly closed by the remote host

谢谢你，Ace shinigami

import socket
from contextlib import closing

def run_server():
    host = '127.0.0.1'
    port = 4000
    backlog = 10
    buf_size = 4096
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    with closing(sock):
        sock.bind((host, port))
        sock.listen(backlog)
        while True:
            conn, address = sock.accept()
            with closing(conn):
                while True:
                    msg = conn.recv(buf_size)
                    print(msg)
    return

run_server()

---

您是否更改了服务器代码？现在，您的服务器反复接受连接，接收消息，然后关闭连接，但新客户端反复发送消息。如果希望服务器继续接受消息，则必须编写一个while循环，循环

conn.recv（buf_size）

。否则，如果要为每条消息重新建立连接，请使用

with

语句将客户端中的while循环移动到外部谢谢！您的评论使我的代码正常工作。